首页|淮南煤田潘三井田西部岩浆岩侵入年代确定与意义

淮南煤田潘三井田西部岩浆岩侵入年代确定与意义

Magmatic Intrusive Age Determination and Its Significance in Western Panji No.3 Minefield,Huainan Coalfield

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岩浆岩在淮南煤田潘谢矿区广泛发育,以潘三井田西翼岩浆岩为研究对象,对采集的岩浆岩样品经破碎、人工分选出锆石,采用激光剥蚀电感偶合等离子体质谱(LA-ICP-MS)对锆石进行元素和同位素测试,将测试结果用isoplot软件包投影到207Pb/235 U-206Pb/238U图解上,并与标准锆石91500分析点所获得的同位素比值经线性拟合.结果表明,研究区内岩浆岩发生侵位的时期为距今大约118Ma,属于早白垩世四川期(135～52Ma)岩浆活动,晚于研究区内主要断层形成的年代.
Magmatic rocks are widely spread in the Panji-Xieqiao mining area. Taking the magmatic rocks in the western Panji No.3 minefield as the investigated subject, the rock samples have been crushed and selected zircons manually; using the laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) carried out zircon element and isotope tests. Then projected the tested results on the diagram of 207Pb/235U-206Pb/238U using ISOPLOT software package, linear fitting with isotope ratio obtained from standard zircon 91500 analysis points. The result has shown, the magmatic intrusive age is about 118Ma ago during the early Cretaceous Sichuan period (135～52Ma) and posterior to the major faults formation in the study area.

Panji No.3 minefieldmagmatic rockisotope dating

苗林、刘桂建、吴盾、吴斌、陈健

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中国科学技术大学地球和空间科学学院,安徽合肥 230026

潘三井田 岩浆岩 同位素定年

国家自然科学基金淮南矿业集团科技计划项目联合资助

41173032

2012

10.3969/j.issn.1674-1803.2012.11.02

中国煤炭地质
中国煤炭地质总局

中国煤炭地质

CSTPCD
影响因子：0.652
ISSN：1674-1803
年,卷(期)：2012.24(11)
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